Dan Luu @danluu.com · 23/09/2026Why didn't Anthropic do effective false positive rejection with their Mythos/Glasswing vuln reports? In danluu.com/ai-coding/#m..., I mentioned a colleague finding that the reports we got were mostly false. That seems common? E.g., gregkh on kernel reports and www.vulncheck.com/blog/anthrop... 2130
Dan Luu @danluu.com · 22/09/2026Did Ralph loops ever work? They were popular for a while, but when I did a comparison, they underperformed. There were all these theories about why Ralph loops were effective ("invert the latent space of the model"), but AFAICT people just didn't run the comparison? danluu.com/pl-tokens/#r... 4320
Reposted by Dan LuuDan McKinley @mcfunley.com · 08/05/2026Maybe the best thing on the internet at the moment: * An AI PR pitching platform has confused Kyle Kingsbury, MMA fighter and podcast host with Kyle Kingsbury, software engineer and gay leather man * Good Kyle decided to start a podcast where he interviews confused manosphere influencersyoutube.comThe Kyle Kingsbury Podcast Podcast - Epsiode 02 Dave RossiYouTube video by Aphyr Null 25820
Dan Luu @danluu.com · 18/09/2026There's no point at which turning your brain off will work: danluu.com/brain-off/ 27017
Dan Luu @danluu.com · 16/09/2026Amazon exec: "you wouldn't notice [if someone blew up a datacenter]. I mean, we might be a bit upset, but you wouldn't notice! [laughs]" Amazon after DCs blown up: "After a thorough assessment, we have determined that we are unable to restore access to the resources and data hosted ...." 3708
Dan Luu @danluu.com · 15/09/2026Interesting to see Steve Yegge say he never successfully built anything with Gas Town. I mentioned not finding these super vibed orchestrators useful because the reliability was too low (w.r.t. completing non-trivial tasks). Turns out the author of the most famous one had the exact same issue. 612211
Dan Luu @danluu.com · 07/09/2026How well do agents use test/verification techniques? danluu.com/agentic-test... 4193
Dan Luu @danluu.com · 01/09/2026How accurate have Ed Zitron's AI skeptic predictions been? danluu.com/zitron/ 1944375
Dan Luu @danluu.com · 21/08/2026There's no reason for software to be slow anymore: danluu.com/perf-opt/ 3844
Dan Luu @danluu.com · 10/08/2026How do programming languages impact token efficiency and correctness? danluu.com/pl-tokens/ 2344
Dan Luu @danluu.com · 02/08/2026Earlier this year, the FTC Chair said "you're going to have a hard time keeping up with the number of cases we're gonna be bringing" on privacy. It seems like this is starting; the FTC has filed a case against a company for promising privacy while running ad trackers on their site, which share info 271
Dan Luu @danluu.com · 24/07/2026Exercises in benchmarking and evals, part 7: performance napkin math, DeepSWE / Senior SWE-Bench, and winter tires danluu.com/exercise-7/ 2130
Dan Luu @danluu.com · 04/07/2026Agentic test processes, LLM benchmarks, and other notes on agentic coding from Galapagos Island: danluu.com/ai-coding/ 1457
Dan Luu @danluu.com · 22/11/2024A version of Missile Command for the Commodore 64 where the bottom of your screen is the game state in memory and missiles cause memory corruption: csdb.dk/release/?id=.... In the video below, a missile broke my controls and caused my cursor to get stuck moving down and to the left. 716745
Dan Luu @danluu.com · 17/11/2024I find it interesting/surprising that Tesla topped the www.iseecars.com/most-dangero... fatalities per mile ranking from 2018-2022. Fatality rate is strongly negatively correlated with price and weight and Teslas are much more expensive and heavier than average. 3221
Dan Luu @danluu.com · 04/11/2024A funny side effect of the crackdown on "AI" scraping is that I keep getting banned from sites for browsing too quickly. I barely use reddit anymore and I still managed to get IP banned for scraping (the error message indicated that I should get in touch with them if I want to do bulk accesses). 2171
Dan Luu @danluu.com · 13/08/2024A former Apple engineer discusses Google product culture: > My director wore an Apple Watch and had an iPhone ... my VP too. Nobody was expected to eat the dog food and so few did. This was crazy to me coming from Apple .... 1496
Reposted by Dan Luu🌇👃🌃 @waxrepli.ca · 02/06/2024i can speak with a little authority on this, i work in this field DCs expend water by evaporation, either in cooling towers or evaporative coolers (water becomes vapor, taking latent heat energy with it into the air and leaving cooler liquid water behind) so we expend liquid water resources 1/ 57223
Dan Luu @danluu.com · 27/05/2024On the 2011-2012 FTC antitrust investigation of Google: danluu.com/ftc-google-a... 183
Reposted by Dan LuuLaurence Tratt @ltratt.bsky.social · 14/05/2024What Factors Explain the Nature of Software? tratt.net/laurie/blog/...tratt.netLaurence Tratt: What Factors Explain the Nature of Software? 041
Dan Luu @danluu.com · 15/04/2024Every once in a while, I think about going to work in the game industry. 1222
Dan Luu @danluu.com · 08/04/2024Interesting comment about SGI leadership knowing about the problems they were facing and still being unable to come up with a way to handle them. 051
Dan Luu @danluu.com · 16/03/2024How web bloat impacts users with slow devices: danluu.com/slow-device/ 44516
Dan Luu @danluu.com · 24/02/2024We're coming up on a decade since danluu.com/cpu-bugs/. Not only was the prediction valid for a decade, it looks like the next decade will be worse. Today's bug of the day: a significant fraction of high-end consumer CPUs crash if you run CPU-intensive workloads: www.radgametools.com/oodleintel.htm 092
Dan Luu @danluu.com · 19/02/2024Diseconomies of scale in fraud, spam, support, and moderation: danluu.com/diseconomies... 192
Reposted by Dan LuuMartin Kleppmann @martin.kleppmann.com · 17/02/2024A thoughtful retrospective by @adamwiggins.bsky.social on the business behind Muse, a tool-for-thought/iPad idea-sketching app. I’m sad that the business didn’t work out as planned, but the software still exists and the underlying goals and values remain good. adamwiggins.com/muse-retrosp...adamwiggins.comMuse retrospective · Adam WigginsThe inside story of four years building Muse, a canvas-based thinking tool for iPad and Mac. 1166
Dan Luu @danluu.com · 08/02/2024Why it's impossible to agree on what's allowed: danluu.com/impossible-a... 192
Dan Luu @danluu.com · 30/01/2024Notes on the accident where a Cruise self-driving car dragged a pedestrian under the vehicle for 20 feet after hitting them: danluu.com/cruise-report/ 020
Dan Luu @danluu.com · 25/01/2024Why do people post on [bad platform] instead of [good platform]? danluu.com/why-video/ 0112
Dan Luu @danluu.com · 31/12/2023How bad are search results and how do small, independent, search engines compare to Google and Bing? danluu.com/seo-spam/ 2143
Dan Luu @danluu.com · 27/11/2023"The algorithm" has somehow decided that I want to see viral UX/designer content. In every viral UX comparison I've seen so far, the "good" version looks more modern but is also less legible / usable. E.g., below, the contrast is lower and legibility is sacrificed for to make things look clean. 350
Dan Luu @danluu.com · 21/11/2023Looking back on this 2015 post about how AI will displace humans, I feel like I got the line of reasoning correct, in that the same debate is happening today and this post pre-emptively refuted the incorrect reasons people are now giving for why LLMs aren't a big deal: danluu.com/customer-ser... 3100
Dan Luu @danluu.com · 09/11/2023Logged on for the first time in months to get some invite cods for folks and I still don't really see much technical content here compared to Mastodon and Twitter. Is it still the case that there isn't critical mass for tech discussions here? 11132
Dan Luu @danluu.com · 07/07/2023The difference in the "What's Hot" feed on Bluesky right now vs. Mastodon really sums up why I've found it so much easier to find discussions I like on Mastodon. Bluesky is full of people crowing over their superiority over threads users. Mastodon has less Threads content but, more importantly 200